MATLAB: Problem with matrix selection

clear data from matrix

Hi i want to clear some data from a matrix a of size 10*20. i have the index of data to clear. for a vector b we do it lik this: b(index)=[]
how to do it for matrix?

Best Answer

You will have to clear a row or a column completely
to remove row
 a=[1 2 3;4 5 6; 7 8 9]
 a(2,:)=[]    % remove 2nd row
to remove column
 a=[1 2 3;4 5 6; 7 8 9]
 a(:,2)=[]  % remove 2nd column
otherwise you need to convert them to NaN if removing individually
a=[1 2 3;4 5 6; 7 8 9]
a(2,2)=NaN   % convert 2nd row 2nd col to NaN
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